Air conditioning units



A ril 28, 1959 R. JORGE NSEN AIR pomarriowmc UNITS s Sheets-Sheet 1Filed Jan. 3. 1956 p i 1959 R. JORGENSEN 2,884,228

AIR CONDITIONING UNITS Filed Jan. s, 1956 '5 Sheets-Sheet 2 12 I v /4ZIN VEN TOR. mnrr lilac/view I HTTOAIVEYS R. JOIR'GEN'SEN AIRCONDITIONING UNITS April 28, 1959 3 Sheets-Sheet 3 Filed Jan. 3, 1956F/GIOT INVENTOR. Ross" JCIPENS'E/V I J BY I United States Patent2,884,228 AIR CONDITIONING UNITS Robert Jorgensen, Kenmore, N.Y.,assignor to Buffalo Forge Company, Buffalo, NY.

Application January 3, 1956, Serial No. 556,858

Claims. (Cl. 257-9) lvfy invention relates in general to airconditioning units and in particular to such units as are provided withtemperature controls.

As is well known to those skilled in the art, the control of the airtemperature in present day units may be accomplished by use of facedampers and of bypass dampers, which method requires either the additionof a bypass duct on the outside of the unit, a bypass duct separate fromthe unit, or the reduction of coil face area in the provision of aninternal bypass duct. Furthermore, in some present day units it isnecessary, because of the arrangement, to incorporate a heating coilwith a face area equal to the face area of the cooling coil while inother arrangements it is possible to'incorporate a heating coil withsomewhat less face area than that of the cooling coil but only at theexpenses of additional cabinet W01 The principal object of my inventionis to overcome the disadvantages above mentioned and to provide a unitof relatively compact structure at reduced cost.

Another object is to provide the cabinet with a cooling coil arranged atan angle, thereby providing a triangular space between the upper end ofthe coil and the outer wall of the cabinet which is utilized as a bypassduct without requiring any additional ducts or the reduction of the faceareas of the coils.

A further object is to arrange the heating coil at an angle to thecooling coil thereby providing an air chamber between the coils.

Moreover, it has been an object to provide a structure in which theheating coil may have less face area than the cooling coil without thenecessity of additional cabinet work, thereby insuring that the entireface areas of the cooling and heating coils will be exposed to thetreated air.

While I have shown my invention as applied to central station equipment,it is obvious that it is applicable also to self-contained units. Theabove objects and advantages have been accomplished by the device shownin the accompanying drawings, of which:

Fig. 1 is a side sectional elevation of my invention;

Fig. 2 is a sectional plan view taken on line IIII of Fig. 1;

Fig. 3 shows in diagrammatic manner a device similar to that of Fig. 1illustrating the use of a mixing box;

Figs. 4 to 6, inclusive, show in diagrammatic manner various forms ofthe invention in which the various parts are located in differentpositions; and

Fig. 7 is a diagrammatic view of a further modification of my device.

My device comprises a casing 10 preferably of rectangular shape having ashort front wall 11 and a full length rear wall 12. A top 13 extendsfrom the front 'wall to the rear wall, and the bottom 14 of the casingforms a pan. End walls 15 and 16 serve to enclose the casing. The casingis provided preferably with an extension 20 of rectangular shapearranged at right angles to the casing '10 and located below the lowerend of the wall 11. This extension is bounded on the lower side of thebottom 14 and on the other side by a top wall 38, and provides an airinlet opening 21. Arranged in the inlet opening are filters 22 and thisopening is divided substantially into a face opening 39 and a bypassopening 40. The casing '10 with the extension'20 shaped housing havingthe inlet opening in one leg forms an L- any suitable means.

thereof and the outlet opening in the other leg thereof. The legs of thecasingare joined together at the inner and outer corners-47 and 48,respectively. Face dampers 23 are arranged in the face opening 39; and,as is customary, these face dampers are each provided with an actuatingarm 24 each of which is pivotally secured to an actuating rod 25,whereby the dampers may be opened or closed in unison.

The casing is formed with a lower chamber 26 and with an upper chamber27. The cooling coil 30 of my device is arranged in the lower chamber 26of the cabinet and is inclined at an angle of substantially 45". Thiscoil may be made in two sections 31 and 32, as shown in Fig. 1. Becauseof the angular arrangement of the cooling coil, theupper frame 33 of thecoil 31 is spaced from the lower edge of the front wall 11 and from theinner corner 47 of the casing, thereby providing a bypass 34 extendingfrom end to end of the casing. The upwardly extending frame 33 and thewall 35 form a partition dividing the upper chamber 27 from the lowerchamber 26. The bypass opening is bounded on its lower side by a wall 36which extends rearwardly to the frame 33 ofthe cooling coil 30. Theentrance 40 to the bypass 34 is provided with an adjustable bypassdamper 41 which is mounted upon a pivot 42. An arm 43 is car- Y ried bythe pivot 42 and a link 45 serves to connect this arm-with an arm 44carried by the pivot 46 of the upper face damper 23. Bygthisarrangement, when the face dampers are actuated to closed'positions, thebypass damper will be moved to openposition 'or vice versa, whereby theincoming air may be graduated to flow through the face dampers and/ orbypass dampers to suit existing conditions. I

Extending across the upper chamber of the casing from the wall 35 to therear wall 12 of the unit is the heating coil 37 of my device. Obviously,air passing through the face dampers 23 will be projected against andpassed through the cooling coils 31 and 32 and thence upwardly throughthe heating coil 37. It will be seen that in all forms of my invention,the cooling coil is arranged at an angle to the heating coil and is inspaced relation therewith, whereby an equalizing chamber 50 is providedwhich permits a smaller heating coil to be used while achieving asubstantially equal distribution of air across the same, therebyeconomizing in the cost of construction. In the operation of my device,if the air passing through the cooling coil is below the desiredtemperature, the face dampers will be partiallyclosed and some air willbe passed through the bypass 34 thereby bringing the air to the desiredtemperature. Obviously, the dampers are controlled by suitable and wellknown thermostat means (not shown), suitably located. The heating cyclemay also be controlled by suitable thermostat means (not shown). Air isdrawn into and through the casing by means of a centrifugal fan 51 whichis actuated by The fan is connected to the space serviced by the unit bywell known duct means (not shown).

The unit is shown in Fig. 3 as similar to that shown in Fig. 1 exceptthat a mixing box 52 is located in front of the air inlet to the casingand it is provided with two inlet ducts 53 and 54, each provided withdampers 55, the duct 53 being connected to the room being serviced, andthe inlet duct 54 being connected to air from outside atmosphere.Obviously, by means of the dampers 55, the desired amount of room airand fresh air may be supplied to the casing.

The form of invention shown in Fig. 4 illustrates a construction inwhich the filters are disposed in the mixing box and are arranged at anangle to each other. This form of invention also shows the face damperand bypass damper as located above the cooling coil and between thiscoil and the upper chamberof the casing.

Fig. shows a construction similar to Fig. 1 except that the mixing boxis arranged above the casing and the fan is located in a horizontalextension of the casing which also contains the heating coil.

Fig. 6 shows a form of invention similar to that illustrated in Fig. 5except that the heating coil is arranged on the inlet side of thecooling coil instead of the outlet side thereof, and the dampers are onthe outlet side.

The modification shown in Fig. 7 is applicable to installation wherevarious other forms of control are utilized, for instance, a modulationof the temperature of the heating and cooling medium supplied to thecoil, or

the quantity of medium supplied thereto. In either of the abovemodifications, the bypass with the damper together with the face dampermay be omitted. As shown in Fig. 7, a baffle 56 is provided whichextends from the frame 33 of thecooling coil 30 to the adjacent part ofthe casing, whereby all of the air treated by the unit is passed throughthe coils. 7

While I have shown and described the cooling coil as being arranged atan angle of susbtantially 45, it is obvious that similar advantages maybe accomplished by arranging the coil at a different angle, providedample space is allowed at one end thereof for the bypass. Furthermore,my invention is applicable to units which are not provided with aheating coil.

These and other modifications of my invention may be made withoutdeparting from the spirit thereof or the scope of the appended claims,and I do not wish to be limited to the exact embodiment shown anddescribed.

What is claimed is:

1. An air conditioning unit comprising a substantially L-shaped casinghaving an inlet opening formed in one leg thereof and an outlet openingformed in the other leg thereof, said leg portions being united at theirinner and outer corners, a heating coil mounted in said casing, acooling coil mounted in said casingin spaced relation to said heatingcoil and arranged at an angle of substantially 45 with the exposed faceof said heating coil and with the walls of said casing, thereby formingan equalizing chamber between said coils, one end of said cooling coilbeing disposed substantially adjacent the inner corner of said legportions, said cooling coil having a face area greater than the facearea of said heating coil, said inlet opening comprising a face openingsubstantially equal in area to the projected area of said cooling coiland a bypass opening separate from and adjacent to said face opening,and means for causing circulation of air through said casing.

2. An air conditioning unit comprising a substantially L-shaped casinghaving an inlet opening formed in one leg thereof and an outlet openingformed in the other leg thereof, said leg portions being united at theirinner and outer corners, a heating coil mounted in said casing, acooling coil mounted in said casing in spaced relation to said heatingcoil and arranged at an angle of substantially 45 with the exposed faceof said heating coil and with the walls of said casing, thereby formingan equalizing chamber between said coils, one end of said cooling coilbeing disposed substantially adjacent the inner corner of said legportions, said cooling coil having a face area greater than the facearea of said heating coil, a fixed partition arranged at the upper endof said cooling coil and arranged perpendicularly to the exposed facethereof, said inlet opening comprising a face opening substantiallyequal in area to the projected area of said cooling coil and a bypassopening separate from'and adjacent to said face opening, said partitionterminating at said inlet passage and separating said face opening fromsaid bypass opening, and means for causing circulation of air throughsaid casing.

3. An air conditioning unit comprising a substantially 4 L-shaped casinghaving an inlet opening formed in one leg thereof and an outlet openingformed in the other leg thereof, said leg portions being united at theirinner and outer corners, a heating coil mounted in said casing, acooling coil mounted insaid casing in spaced relation to said heatingcoil and arranged at an angle of substantially 45 with the exposed faceof said heatingcoil and with the walls of said casing, thereby formingan equalizing chamber between said coils, one end of said cooling coilbeing disposed substantially adjacent the inner corner of said legportions, said heating coil having a face area substantially equal tothe projected face area of said cooling coil, said inlet openingcomprising a face openingsubstantially equal in area to the projectedarea of said cooling coil and a bypass opening separate from andadjacent to said face opening, and means for causing circulation of airthrough said casing.

4. An air conditioning unit comprising a substantially rectangularcasing having walls formed with inlet and outlet passages arranged atsubstantially right angles to each other, said casing having inner andouter corners at 0pposite spaced points, a cooling coil mounted in saidcasing and having its exposed faces arranged at an angle ofsubstantially 45 to the direction of flow of air through said inletpassage, said coil being located in the space between said corners, afixed 'imperforate partition disposed at the upper end of said coil andextending substantially the width of said casing, said partition forminga wall defining a bypass opening, said partition being substantiallyperpendicular to the exposed faces of the coil and being opposite to andspaced from the inner corner of said casing at the inlet side thereofand thereby forming a bypass about said coil, said inlet passage havinga face opening substantially equal in area to the projected face area ofsaid cooling coil and separate from and'arranged adjacent said bypassopening, said partition terminating at said inlet passage, and means forcausing circulation of air through said casing.

5. An air conditioning unit comprising a substantially rectangularcasing having walls formed with inlet and outlet passages arranged atright angles to each other, a cooling coil inserted in said casing tosubstantially bisect the right angle and having its exposed facesarranged at a common angle of substantially 45 to the directions of flowof air both from said inlet passage and to said outlet passage forlocating the cooling coil on a median plane between the two directionsof air flow, a fixed imperforate partition disposed at the upper end ofsaid coil and extending the longitudinal width of said casing, saidpartition being arranged substantially perpendicular to the exposedfaces of the coil and being opposite to and spaced from the inner cornerof said casing at the inlet side thereof, said inlet passage comprisinga face opening substantially equal in area to the projected area of saidcooling coil, said fixed imperforate partition defining a bypass openingabout the cooling coil with its minimum face dimension intersecting themedian plane, said partition terminating at said inlet passage andseparating said face opening from said bypass opening, and means forcausing circulation of air through said casing.

References Cited in the file of this patent UNITED STATES PATENTS1,605,119. Lewis Nov. 2, 1926 1,849,061 Anderson Mar. 15, 1932 1,927,869Downs Sept. 26, 1933 2,079,562 Olson et a1, May 4, 1937 2,093,691 BuderSept. 21, 1937 2,283,928 Huggins May 26, 1942 2,327,663 Otis Aug. 24,1943 2,739,794 Graham Mar. 27, 1956 2,743,908 Tanner May 1, 1956 FOREIGNPATENTS 379,663 :Great Britain Sept. 1, 1932

